1320221720

素因数分解:

$2^3\times 5^1\times {\mathrm{199}}^1\times {\mathrm{165857}}^1$

素因数の和:166067

約数の個数: 32

約数和(自身を含む): 2985444000

約数和(自身を除く): 1665222280

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 199, 398, 796, 995, 1592, 1990, 3980, 7960, 165857, 331714, 663428, 829285, 1326856, 1658570, 3317140, 6634280, 33005543, 66011086, 132022172, 165027715, 264044344, 330055430, 660110860, 1320221720]

約数ペア:

[(1, 1320221720), (2, 660110860), (4, 330055430), (5, 264044344), (8, 165027715), (10, 132022172), (20, 66011086), (40, 33005543), (199, 6634280), (398, 3317140), (796, 1658570), (995, 1326856), (1592, 829285), (1990, 663428), (3980, 331714), (7960, 165857)]